By which I mean there isn't anything that officially differentiates a 4c from a 4b. If you sat a SATs paper, then they'd roughly split the grade boundary in 3 so anyone who got say 90 got a 4b and anyone who got 91 got a 4a, but apart from that sublevels are meaningless.

Ah, OK thanks. Her school has a list of tick off points for each sublevel. She left one school at a 4b, the next school at a 5, now new school is claiming she is not even a 4c, until she has ticked off all these points. Although her homework seems harder than the new curriculum revision books.

It's primary, offshore, DD is in yr6. They follow the standard UK curriculum but haven't opted for the new curriculum and have switched to iGCSE. Thank you for the link it is helpful. The school has an in-depth checklist, an A4 sheet for each sublevel, but the kids don't get to fetch it home. DD is feeling very demoralised, as she has worked hard and now feels she is at the bottom, she says she often has to re-do work that she's done at her old school. Looking quickly at your link, the algebra she had for homework this week is certainly level 5.